Icom IC-M91D Service Manual Addendum

4 - 4
4-5 PORT ALLOCATIONS
• CPU (MAIN UNIT: IC360)
PIN
No.
LINE
NAME
DESCRIPTION I/O
10 UP
[Y] key input.
L=Pushed.
I
11 DN
[Z] key input.
L=Pushed.
I
12 LEFT
[ ] key input.
L=Pushed.
I
13 RIGHT
[ ] key input.
L=Pushed.
I
14 ENT
[ENT] key input.
L=Pushed.
I
15 CLR
[CLEAR] key input.
L=Pushed.
I
18 MENU
[MENU] key input.
L=Pushed.
I
19 CH16
[16/C] key input.
L=Pushed.
I
20 DIST
[DISTRESS] key input.
L=Pushed.
I
21 S1
Soft key (S1*) input.
L=Pushed.
I
22 S2
Soft key (S2*) input.
L=Pushed.
I
25 NRST
CPU reset.
L=The CPU is reset.
I
26 TEMPV Temperature sensing voltage. I
27 TDETV
Transmit output power sensing voltage. I
28 LOINV Lock voltage input. I
29 WDECV Weather alert signal detect. I
34 PWSW
Power switch input.
L=Pushed.
I
36 MUTE
AF power AMP (IC362) control.
L= AF Mute.
O
40 DSCOUT DSC signal encoding output. O
41 BEEP Beep audio. (Square waves) O
44 NOISEV Noise level detect. I
45 RSSIV
RSSI voltage from the IF IC (RF
UNIT: IC170).
I
46 BATTV Battery pack voltage. I
47 EXTDET
External connection detect.
L=Connection is detected.
I
49 S3
Soft key (S3*) input.
L=Pushed.
I
50 S4
Soft key (S4*) input.
L=Pushed.
I
53 PTTIN
[PTT] input.
L=Pushed.
I
54 MONI
[VOL/SQL] key input.
L=Pushed.
I
55 EXPTTIN
External [PTT] input.
H=Pushed.
I
56,
57
DB0, DB1 LCD driver (DS246) control signal. I/O
58 SDATA Common serial data. I
59 SCK Common serial clock. I
63 DASTB D/A converter (IC190) strobe. I
64 PLSTB PLL (RF UNIT: IC1) strobe. I
79 AFVS
AF power AMP control.
H= AF power AMP (IC362) is acti-
vated.
O
PIN
No.
LINE
NAME
DESCRIPTION I/O
80 SPON
RX AF line switching control.
H= AF signal is output from the inter-
nal speaker.
O
81 LOW
Transmit output power control.
L=High power is selected.
O
85 PTTM
MIC mute switch control.
L=Internal MIC mute.
H= External microphone is used, or
while receiving.
O
86 M5VS
Power supply line “M5V” control.
H=While transceiver’s power is ON.
O
87–
92
DB2–DB7 LCD driver (DS246) control signal. O
93 WR0
LCD driver (DS246) write mode switch. O
98 G_HIB
GPS module (CHASSIS: EP1) oper-
ating mode switching.
L=Standby mode.
O
99 G_WKUP
GPS module (CHASSIS: EP1) status.
L= Low power state (Hibemate mode/
standby mode).
H=Operation mode.
I
103 DSCIN Decoded DSC signal input. I
111 G_TXD GPS data output. (4800 bps) O
112 G_RXD GPS data input. (4800 bps) I
113 CLOTXD Cloning data. O
114 DTEST DSC loop back testing signal. O
116 CLORXD Cloning data. I
117 PON
Power supply line VCC control.
L=While transceiver's power is ON.
O
118 T5VS
Power supply line “T5V” control.
H=While transmitting.
O
119 TXMS
Transmission mute.
H=TX Mute.
O
122 RVS
Power supply line “R3V” control.
H=While receiving.
O
123 RINTM
RX AF mute switch control.
H=AF mute.
O
124 CD
LCD driver (DS246) mode switching
control.
L=While sending control data.
H=While sending display data.
O
125 CS LCD driver (DS246) chip select. O
126 RESETB
LCD driver (DS246) reset signal.
L=The LCD driver is reset.
O
132 AFVCTRL
AF circuit power supply voltage control.
L= While the internal speaker is
used.
O
135 UNLK
PLL (RF UNIT: IC1) unlock detect.
L=Unlocked.
I
136 DIMM LCD brightness control. O
141 ECK EEPROM (IC340) serial clock. O
142 EDATA EEPROM (IC340) serial data. I/O
*; Soft key location
S4
S3
S1
S2

Icom IC-M91D Specifications

General

Brand	Icom
Model	IC-M91D
Category	Transceiver
Language	English